CVE-2026-42216

CRITICALNVD 9.19.1—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.1 under NVD CVSS v3. EPSS exploit probability: 0.5%, top 61% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
Trending — 3 sources updated this weekElevated
9.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 9.1Exploit: Elevated riskExposed: 0

A fix is available — apply it.

OpenEXR provides the specification and reference implementation of the EXR file format, an image storage format for the motion picture industry. From versions 3.0.0 to before 3.2.9, 3.3.0 to before 3.3.11, and 3.4.0 to before 3.4.11, IDManifest::init() reconstructs strings from a prefix-compressed representation. If the previous string is longer than 255 bytes, the next string is expected to begin with a 2-byte prefix length. The code reads stringList[i][0] and stringList[i][1] without checking that the current string has at least two bytes. This issue has been patched in versions 3.2.9, 3.3.11, and 3.4.11.

CVSS v3
9.1
EG Score
9.1(medium)
EG Risk
72(Attend)
EG Risk 72/100SSVC: Attend

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity91% × 45%
Exploitation40% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
0%
EPSS %ILE
39%
KEV
Not listed

Published

May 7, 2026

Last Modified

September 9, 2026

Advisory Details (9)

Auto-updated Sep 7, 2026
🔬 Proof of concept available. Patch available. Sources: github, redhat.
github Patch Available🟡 PoC Available

Out-of-bounds read in `IDManifest::init()` during prefix expansion · Advisory · AcademySoftwareFoundation/openexr · GitHub

https://github.com/AcademySoftwareFoundation/openexr/security/advisories/GHSA-65j8-95g9-jgj4
redhat Patch Available

2467633 – (CVE-2026-42216) CVE-2026-42216 OpenEXR: OpenEXR: Information disclosure and denial of service via malformed EXR files

Affected: Red Hat Enterprise Linux 10

https://bugzilla.redhat.com/show_bug.cgi?id=2467633
redhat Patch Available

CVE-2026-42216 - Red Hat Customer Portal

Affected: Red Hat Enterprise Linux 8 or OpenShift Container Platform 4, is affected by this vulnerability and a fix may be released to a

https://access.redhat.com/security/cve/CVE-2026-42216
redhat Patch Available

Affected: Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions.

https://access.redhat.com/errata/RHSA-2026:39027
redhat Patch Available

Affected: Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions.

https://access.redhat.com/errata/RHSA-2026:39026
redhat Patch Available

Affected: Red Hat Enterprise Linux 9.6 Extended Update Support.

https://access.redhat.com/errata/RHSA-2026:39025
redhat Patch Available

Affected: Red Hat Enterprise Linux 10.0 Extended Update Support.

https://access.redhat.com/errata/RHSA-2026:39024
redhat Patch Available

Affected: Red Hat Enterprise Linux 10.

https://access.redhat.com/errata/RHSA-2026:38499
redhat Patch Available

Affected: Red Hat Enterprise Linux 9.

https://access.redhat.com/errata/RHSA-2026:38498

Vendor Advisories for CVE-2026-42216(5)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(6)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatopenexr-0:3.1.1-3.el9_8.32026-07-13redhat
redhatopenexr-0:3.1.1-2.el9_2.42026-07-13redhat
redhatopenexr-0:3.1.1-2.el9_4.42026-07-13redhat
redhatopenexr-0:3.1.1-3.el9_6.32026-07-13redhat
redhatopenexr-0:3.1.10-8.el10_2.32026-07-13redhat
redhatopenexr-0:3.1.10-8.el10_0.32026-07-13redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(4 across 4 ecosystems)
Debian:11(1)
PackageVulnerable rangeFixed inDependents
openexr2.5.4-2 ... 3.4.6+ds-4 (19 versions)——
Debian:12(1)
PackageVulnerable rangeFixed inDependents
openexr3.1.13-1 ... 3.4.6+ds-4 (10 versions)——
Debian:13(1)
PackageVulnerable rangeFixed inDependents
openexr3.1.13-2 ... 3.4.6+ds-4 (6 versions)——
Debian:14(1)
PackageVulnerable rangeFixed inDependents
openexr3.1.13-2, 3.4.6+ds-1, 3.4.6+ds-2, 3.4.6+ds-3, 3.4.6+ds-43.4.14-0.1—

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Additional Vendor Advisories

(1)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 8× in last 7d / 32× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 214 total refreshes for this CVE.

  1. 2026-09-13 16:47 UTCEPSS rescore
  2. 2026-09-12 15:01 UTCEPSS rescore
  3. 2026-09-11 14:53 UTCEPSS rescore
  4. 2026-09-11 09:37 UTCEPSS rescore
  5. 2026-09-10 09:34 UTCEPSS rescore
  6. 2026-09-09 12:39 UTCEG score recompute
  7. 2026-09-09 12:39 UTCVendor advisory
  8. 2026-09-08 22:00 UTCEPSS rescore
  9. 2026-09-07 16:01 UTCEPSS rescore
  10. 2026-09-06 13:47 UTCEPSS rescore
  11. 2026-09-04 05:06 UTCEPSS rescore
  12. 2026-09-02 14:12 UTCEPSS rescore
  13. 2026-09-01 13:54 UTCEPSS rescore
  14. 2026-08-30 19:17 UTCEPSS rescore
  15. 2026-08-30 01:22 UTCEPSS rescore
  16. 2026-08-28 21:41 UTCEPSS rescore
  17. 2026-08-27 14:25 UTCEPSS rescore
  18. 2026-08-26 14:46 UTCEPSS rescore
  19. 2026-08-25 13:49 UTCEPSS rescore
  20. 2026-08-23 19:38 UTCEG score recompute
  21. 2026-08-23 19:38 UTCVendor advisory
  22. 2026-08-23 00:19 UTCEPSS rescore
  23. 2026-08-21 23:49 UTCEPSS rescore
  24. 2026-08-20 22:55 UTCEPSS rescore
  25. 2026-08-19 17:03 UTCEPSS rescore
Show 75 more
  1. 2026-08-18 13:48 UTCEPSS rescore
  2. 2026-08-17 13:47 UTCEPSS rescore
  3. 2026-08-17 12:48 UTCEG score recompute
  4. 2026-08-17 12:48 UTCVendor advisory
  5. 2026-08-16 14:56 UTCEPSS rescore
  6. 2026-08-16 12:28 UTCVendor advisory
  7. 2026-08-16 08:37 UTCVendor advisory
  8. 2026-08-16 04:45 UTCEG score recompute
  9. 2026-08-16 04:45 UTCVendor advisory
  10. 2026-08-16 02:14 UTCEPSS rescore
  11. 2026-08-15 02:26 UTCEG score recompute
  12. 2026-08-15 02:26 UTCVendor advisory
  13. 2026-08-15 01:30 UTCEPSS rescore
  14. 2026-08-14 22:35 UTCVendor advisory
  15. 2026-08-14 18:44 UTCVendor advisory
  16. 2026-08-14 14:53 UTCVendor advisory
  17. 2026-08-14 11:02 UTCVendor advisory
  18. 2026-08-14 07:11 UTCVendor advisory
  19. 2026-08-14 03:20 UTCEG score recompute
  20. 2026-08-14 03:20 UTCVendor advisory
  21. 2026-08-13 22:00 UTCEPSS rescore
  22. 2026-08-13 08:20 UTCVendor advisory
  23. 2026-08-13 04:28 UTCVendor advisory
  24. 2026-08-13 00:37 UTCVendor advisory
  25. 2026-08-12 20:46 UTCVendor advisory
  26. 2026-08-12 16:55 UTCEG score recompute
  27. 2026-08-12 16:55 UTCVendor advisory
  28. 2026-08-12 13:51 UTCEPSS rescore
  29. 2026-08-11 23:39 UTCVendor advisory
  30. 2026-08-11 19:48 UTCVendor advisory
  31. 2026-08-11 15:57 UTCEG score recompute
  32. 2026-08-11 15:57 UTCVendor advisory
  33. 2026-08-11 13:43 UTCEPSS rescore
  34. 2026-08-11 09:08 UTCVendor advisory
  35. 2026-08-11 05:18 UTCVendor advisory
  36. 2026-08-11 01:27 UTCEG score recompute
  37. 2026-08-11 01:27 UTCVendor advisory
  38. 2026-08-11 00:00 UTCEPSS rescore
  39. 2026-08-10 13:39 UTCVendor advisory
  40. 2026-08-10 09:37 UTCVendor advisory
  41. 2026-08-10 05:46 UTCVendor advisory
  42. 2026-08-10 01:55 UTCVendor advisory
  43. 2026-08-09 22:04 UTCVendor advisory
  44. 2026-08-09 18:13 UTCVendor advisory
  45. 2026-08-09 14:22 UTCEG score recompute
  46. 2026-08-09 14:22 UTCVendor advisory
  47. 2026-08-09 13:46 UTCEPSS rescore
  48. 2026-08-09 10:30 UTCVendor advisory
  49. 2026-08-09 06:21 UTCVendor advisory
  50. 2026-08-09 02:30 UTCEG score recompute
  51. 2026-08-09 02:30 UTCVendor advisory
  52. 2026-08-08 16:37 UTCEPSS rescore
  53. 2026-08-08 13:27 UTCVendor advisory
  54. 2026-08-08 09:35 UTCVendor advisory
  55. 2026-08-08 05:44 UTCVendor advisory
  56. 2026-08-08 01:53 UTCVendor advisory
  57. 2026-08-07 22:02 UTCVendor advisory
  58. 2026-08-07 18:11 UTCEG score recompute
  59. 2026-08-07 18:11 UTCVendor advisory
  60. 2026-08-07 14:20 UTCVendor advisory
  61. 2026-08-07 10:29 UTCVendor advisory
  62. 2026-08-07 01:50 UTCVendor advisory
  63. 2026-08-06 20:45 UTCVendor advisory
  64. 2026-08-06 16:54 UTCEG score recompute
  65. 2026-08-06 16:54 UTCVendor advisory
  66. 2026-08-06 13:46 UTCEPSS rescore
  67. 2026-08-06 10:10 UTCVendor advisory
  68. 2026-08-06 05:57 UTCVendor advisory
  69. 2026-08-06 02:06 UTCVendor advisory
  70. 2026-08-05 22:15 UTCEG score recompute
  71. 2026-08-05 22:15 UTCVendor advisory
  72. 2026-08-05 19:17 UTCEPSS rescore
  73. 2026-08-04 15:10 UTCEPSS rescore
  74. 2026-08-04 10:38 UTCEPSS rescore
  75. 2026-08-04 03:31 UTCVendor advisory

Frequently asked(5)

What is CVE-2026-42216?
CVE-2026-42216 is a critical vulnerability published on May 7, 2026. OpenEXR provides the specification and reference implementation of the EXR file format, an image storage format for the motion picture industry. From versions 3.0.0 to before 3.2.9, 3.3.0 to before 3.3.11, and 3.4.0 to before 3.4.11, IDManifest::init() reconstructs strings from a prefix-compressed…
When was CVE-2026-42216 disclosed?
CVE-2026-42216 was first published in the National Vulnerability Database on May 7, 2026, with the most recent update on September 9, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-42216 actively exploited?
CVE-2026-42216 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 61.0% of all scored CVEs.
What is the CVSS score of CVE-2026-42216?
CVE-2026-42216 has a CVSS v3 base score of 9.1 (NVD).
How do I remediate CVE-2026-42216?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-42216, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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